Former pro tennis player Serena Williams is the co-founder of Will Perform, a new brand of topical products for pain relief and muscle care designed for fitness lovers and the specific recovery needs of athletes. Williams partnered with Hank Mercier, who will serve as CEO, and Eric Ryan to co-found the brand. The line is powered by ingredients like camphor, menthol, lavender and more to soothe body soreness. Its initial offering consists of four categories, including Relieve, Cool, Soothe, and Rest, for both daily and nightly use. Items began selling on Dec. 8 at the Will Perform website. Williams, considered one of the greatest tennis players of all time, took part in her last professional tournament at this year’s US Open.